field



2 She'ets-Sheet 1.

(No Model.)

S. D. FIELD.

PRINTING TELEGRAPH.

Patented Mar. 23, 1886. F171. 7

(No Model.) 3 2 Sheets- SHeet-Q S. D. FIELD.

PRINTING TELEGRAPH.

No. 338,344. Patented Mar. 23, 1886.

N. PETERS Plmkv-Lilhogmphen Washington. 0.0.

UNITED STATES,

PATENT OFFICE.

STEPHEN DUDLEY FIELD, OF NEW YORK, N. Y., ASSIGNOR T THE COM- MERCIAL TELEGRAM COMPANY, OF SAME PLACE.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 338,344, dated. March 23, 1886.

Application filed November 27,1885.

" To aZZ whom, it may concern:

Be it known that I, STEPHEN DUDLEY FIELD, of New York city, in the county and State of New York, have invented a certain new and useful Improvement in Printing-Telegraphs, of which the following is a specificatlon.

My invention relates to that class of printing-telegraph receivers wherein two typewheels are operated by separate weight-trains.

and are controlled by a single magnet-armature.

The object I have in View is to produce a simple mechanism for operating and control- I5 ling the type-wheelsswhich will combine the features of a single scape-wheel and pallet with that of applying the power of the weighttrains to opposite sides of the type-wheels, the type-wheels being both locatedoutside the 29 main frame on one side, while the weight trains are located within the main frame.

A. further object is to simplify and make more efficient the maintainingsprings and connecting parts.

In the accompanying drawings, forming a part hereof, Figure 1 is a side elevation of the machine with part of the main frame broken away to show dogs assisting maintainingsprings; Fig. 2, an end view of machine with 30 frame broken away on line 2 2 in Fig. 1, and

Fig. 3 a sectional view of one of the maintaining-springs.

The main frame of my printingtelegraph receivers is composed of two upright side 5 plates or frames, A A, connected by crosspieces held by screws a, Fig. 1. One of these cross-pieces, b, is shown in Fig. 2. Between the side plates, A A, are located the weight trains. These are composed of the weightdrums B B, with winding-stems 0. Each weight-drum is connected, as usual, bya pawl and ratchet, d d, with a gear-wheel, O, which is connected with pinions e e on the type-wheel shafts through a sufficient number of inter- 5 mediate wheels and pinions to increase the speed to the desired extent.

In the machine shown each train has, in MI dition to gear-wheel O on weight-drum shaft and pinion e or e on type-wheel shaft, three intermediate wheels, E F G, and two pin- Serial No. 184,008. (No model.)

ions, f g, these wheels and pinions being carried by shafts E F G. p

In printing-telegraph receivers it is necessary and usual to introduce in trains for running the type-wheels springs for maintaining uniform speed of type-wheels while the weights are being wound up, and also to compensate for any irregularities in the running of the trains. These maintaining-springs have heretofore been located at the drum end of train, and have required special ratchets for preventing a reverse movement. In my machine I locate the maintaining-s iirings at the type-wheel end of trains, and secure a freer movement, since the springs drive a smaller number of parts with less weight and friction. This location also enables me to use a spring-dog for each train, engaging one of the train-wheels, in place of the special ratchet heretofore employed.

Each maintaining-spring H, Fig. 3,is placed around the last shaft, G, of train, being attached at its outer end to an inclosing-shell,

h, secured to such shaft. Its inner end is secured to the extended hub of wheel G, which is sleeved loosely on shaft G and projects into the shell h, the movement of train communicated from shaft G to spring H winding up such spring, and from the spring to wheel G.

A pin, 13, on shaft G, engaging a pin, 7;, on wheel G, prevents the weight-train from winding up the spring more than one revolution of shaft G while wheel G is held at rest, as it is when the type-wheel is at unison.

A spring-dog, 7c, engages the wheel F of 8.5 train to assume the action of spring in a forward direction upon the type-wheel, instead of in a reverse direction on train, while the weight is being wound up.

I I are the type-wheels, mounted side by side upon the adjoining ends of shafts K K, and adapted to print two lines upon the tape. The shafts K K carry the pinions e 6, before referred to, and are themselves sleeves mounted upon a third shaft, L, and connected there- 5 with by pawls and ratchets Z Z. Shaft L has scape-wheel L fixed thereon and engaging pallet L. The type-wheel shafts K K have pins m, alternately engaging the unison-stop m.

The escapement-movement is not of my in- 10c vent-ion, and its operation will be understood without further description. The shaft L extends through both of the side plates, AA, of main frame, and beyond the side plate A into a bracket-plate, A supported by horizontal studsnfrom plate A. The sleeved type-wheel shaft K extends from near the scape-wheel L (which is between A and A) through A,while K issleeved on Lwholly between A and A, and thus both type-wheels are brought together outside the main frame and between the side plate A of main frame and the bracketplate A. The final shaft G of the train from drum B, which drives shaft K and type-wheel I, extends from side to side of main frame, and the pinion 6 being between A and A the wheel G of train is also between A and A. The final shaft G of train from drum B, however, extends from a bracket, 0, just within side plate A, through such side plate A to bracketplate A, and this shaft G carries its wheel G outside of A in the space between A and A, and this wheel engages pinion e of type-wheel shaft K, which is located in the space between A and A.

By the means described the typewheels are driven from opposite sides by trains located on the same side of the type-wheels, thus bringing the type-wheels together outside-of main frame on one side, while both weighttrains are located within such frame.

What I claim is- 1. In aprinting-telegraph receiver, the com bination, with the main frame, of two powertrains located within such main frame, two type-wheels located together outside the main frame on one side thereof, and connections from such power-trains to the outer sides-0f the type-wheels, substantially as set forth.

2. 1n aprintingtelegraph receiver, the combination, with the main frame, of two powertrainslocated within such main frame, and two type-wheels located together outside such main frame and between a side plate of said main frame and a bracket-plate supported there from, the shaft of one type-wheel extending into the space within main frame and connected with one train therein, and the final shaft of the other train extending outwardly to bracket-plate across both type-wheels and connected with shaft of outer type-wheel out side main frame, substantially as set forth.

3. In aprinting-telegraph receiver, the combination, with the main frame, of two powertrains located. within main frame, two typewheels located together outside main frame on one side thereof, and carried by shafts sleeved on an escapement-shaft and connected there with by pawls and ratohets, and connections from such power-trains to the typewvheel shafts outside of type-wheels, substantially as set forth.

4:. In aprinting-telegraph receiver, the combination,with a power-train and a type-wheel driven thereby, of a maintaining-spring interpolated in the train at the type-wheel end thereof, substantially as set forth.

5. In a printingtelegraph receiver, the combinatiomwith a power-train and a type-wheel driven thereby, of a maintaining-spring interpolated in the train at the type-wheel end thereof, and a dog engaging the cog-teeth of one of the intermediate train-wheels, substantially as set forth.

This specification signed and witnessed this 24th day of November, 1885.

STEPHEN DUDLEY FIELD. l'Vitnesses:

CORNELIUS BLAUVELT, \V. B. HERBERT. 

